On Sun, Mar 09, 2025 at 08:04:58PM -0500, David Wright wrote:

In this context, my understanding of an Internet mail server can be
illustrated in the following way. If your "machine in the LAN"
receives emails by asking for them from another machine, then it's not
an IMS. If you can switch off the machine for a week or two and yet
not lose any emails, then it's not an IMS.

I stand corrected regarding "server" and "provider".  But is there a
term for the machines in the LAN devoted to a specific task?

Examples:

= mail gatherer (using getmail) for all mail addresses

= weather station data gatherer which obtains latest weather
parameters, creates fresh web pages, and uploads web pages to a web
site on my ISP

= machine which runs approx to cache Debian package files

= machine which manages the git archives for the LAN

RLH

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